diff --git a/src/appearancegtk2.cpp b/src/appearancegtk2.cpp
--- a/src/appearancegtk2.cpp
+++ b/src/appearancegtk2.cpp
@@ -43,8 +43,6 @@
     for(auto it = foundSettings.constBegin(), itEnd = foundSettings.constEnd(); it!=itEnd; ++it) {
         if (it.key() == "gtk-theme-name")
             m_settings["theme"] = *it;
-        else if (it.key() == "gtk-primary-button-warps-slider")
-            m_settings["primary_button_warps_slider"] = *it;
     }
     return true;
 }
@@ -145,12 +143,7 @@
 
 void AppearanceGTK2::reset()
 {
-    m_settings = QMap<QString, QString> {
-        {"toolbar_style", "GTK_TOOLBAR_ICONS"},
-        {"show_icons_buttons", "0"},
-        {"show_icons_menus", "0"},
-        {"primary_button_warps_slider", "false"}
-    };
+    m_settings = QMap<QString, QString> {};
 }
 
 QString AppearanceGTK2::defaultConfigFile() const
diff --git a/src/appearancegtk3.cpp b/src/appearancegtk3.cpp
--- a/src/appearancegtk3.cpp
+++ b/src/appearancegtk3.cpp
@@ -81,12 +81,10 @@
     }
 
     m_settings = QMap<QString, QString> {
-        {"primary_button_warps_slider", "false"},
         {"application_prefer_dark_theme", "false"}
     };
 
     m_settings["theme"] = group.readEntry("gtk-theme-name");
-    m_settings["primary_button_warps_slider"] = group.readEntry("gtk-primary-button-warps-slider");
     m_settings["application_prefer_dark_theme"] = group.readEntry("gtk-application-prefer-dark-theme");
     for(auto it = m_settings.begin(); it != m_settings.end(); ) {
         if (it.value().isEmpty())
diff --git a/src/gtkconfigkcmodule.cpp b/src/gtkconfigkcmodule.cpp
--- a/src/gtkconfigkcmodule.cpp
+++ b/src/gtkconfigkcmodule.cpp
@@ -92,7 +92,6 @@
     connect(ui->cb_theme, SIGNAL(currentIndexChanged(int)), this, SLOT(appChanged()));
     connect(ui->cb_theme_gtk3, SIGNAL(currentIndexChanged(int)), this, SLOT(appChanged()));
     connect(ui->checkBox_theme_gtk3_prefer_dark, &QAbstractButton::clicked, this, &GTKConfigKCModule::appChanged);
-    connect(ui->buttonGroup_primary_button_warps_slider, SIGNAL(buttonToggled(QAbstractButton*, bool)), this, SLOT(appChanged()));
 
     //preview updates
     connect(ui->gtk2Preview, &QAbstractButton::clicked, this, &GTKConfigKCModule::runGtk2IfNecessary);